Annual report pursuant to Section 13 and 15(d)

Summary of Quarterly Financial Data (Unaudited) - Additional Information (Details)

v3.20.4
Summary of Quarterly Financial Data (Unaudited) - Additional Information (Details) - USD ($)
3 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Condensed Unaudited Quarterly Financial Data [Line Items]        
Asset impairment charges   $ 270,017,000 $ 20,768,000 $ 29,514,000
Executive transition costs     6,300,000 1,600,000
Long-term compensation costs $ 32,500,000     32,500,000
Pre-tax charge related to the extinguishment of debt   0 (6,690,000) $ 0
Franchised dealerships        
Condensed Unaudited Quarterly Financial Data [Line Items]        
Asset impairment charges   $ 270,000,000.0 $ 1,101,000